The Latest On The NSA Surveillance Story

In the past several days, there's been a steady flow of leaks about the National Security Agency and its secret surveillance activities, including the gathering of metadata on domestic and foreign telephone calls and the existence of PRISM, described in media reports as a top-secret data-mining program.

New developments are occurring on a daily basis. Here are a few we're watching right now:

-- A spokesman for the Director of National Intelligence has requested that a criminal probe be opened into leaks of classified material about secret surveillance programs, according to Reuters. A spokesman for DNI, Shawn Turner, tells the news agency that a "crimes report has been filed" by the NSA with the Department of Justice.

"The idea that in GCHQ people are sitting around working out how to circumvent a U.K. law with another agency in another country is fanciful," he said, referring to Britain's equivalent of the NSA. "It is nonsense."

-- On Saturday, The Guardian, in the latest of its reports on the surveillance activities, claims to have revealed the existence of a secret data-cataloging tool called Boundless Informant, which the newspaper says can produce a sort of country-by-country "heat map" detailing the "voluminous amount of information it collects from computer and telephone networks."